feat: add repository pattern, service layer architecture, and scheduler management

- Implement repository pattern for data access layer
- Add comprehensive service layer for business logic
- Create scheduler management system with health monitoring
- Add bounded buffer utility for memory management
- Enhance security audit logging with retention policies

components/DateRangePicker.tsx

@@ -5,7 +5,7 @@ import { useEffect, useId, useState } from "react";
 interface DateRangePickerProps {
   minDate: string;
   maxDate: string;
-  onDateRangeChange: (_startDate: string, _endDate: string) => void;
+  onDateRangeChange: (startDate: string, endDate: string) => void;
   initialStartDate?: string;
   initialEndDate?: string;
 }